214 



LEGUMINOSAE. 



in terminal spikes or racemes; calyx 2-lipped, the upper lip often 

 bifid, the lower sometimes 3-toothed; standard orbicular with 

 reflexed sides; wings obovate, united at the summit and enclosing 

 the' falcate keel; stamens united into a closed tube; ovary sessile; 

 pod more or less flattish, leathery and hairy. 



microcarpus. 

 carnosulus. 



micranthus. 

 bicolor. 



polyphyllus. 

 columbianus. 



with loose hairs, 

 mm. long; alpine 



Annuals. 



Corolla 15 mm. long; pod short, ovate, villous, 1 or 2- 



seeded. L. 



Corolla 6-8 mm. long; pods linear, silky, 4-6-seeded. 

 Bracts equalling or exceeding the calyx; plant suc- 

 culent. L. 

 Bracts much shorter than the calyx; plants not suc- 

 culent. 

 Flowers subsessile, 6 mm. long. L. 

 Flowers distinctly pcdicelled, 8 mm. long. L. 

 Perennials. 



Calyx saccate or spurred at base. L. laxiflorus. 



Calyx symmetrical or nearly so. 



Pubescence thin, never silky or villous; leaves gla- 

 brous above. 

 Leaflets 10-16, very large, 6-14 cm. long; stems 



usually simple; pods loosely villous. L. 



Leaflets 6-9, 4-9 cm. long; stems usually branched; 

 pods thinly pubescent. L. 



Pubescence either silky or villous. 

 Herbage more or less villous 

 never silky. 

 Keel ciliate; corolla 8-10 



plant, 10-20 cm. high. L. volcanicus. 



Keel naked; corolla larger. 



Corolla 15-18 mm. long; pubescence long 

 villous; somewhat fleshy plant of the 

 seacoast. 

 Corolla 12-16 mm. long; pubescence thin, 

 short-villous; subalpine plant. 

 Herbage silky, often silvery. 



Stems dwarf, 7-15 cm. high; racemes short; 

 high alpine species. 

 Leaflets 5-8, acutish; standard elliptical. 

 Leaflets 7-10, obtuse; standard orbicular. 

 Stems taller; racemes usually elongate. 



Leaves mostly basal and the stems scape- 

 like. 

 Pubescence very silky and silvery; 



pods not villous. 

 Pubescence somewhat loose and shaggy, 

 not silvery; pods villous. 

 Leaves not mostly basal, the stems leafy. 

 Keel narrow, bent at nearly a right 

 angle, early exposed for much of 

 its length; pubescence thin. 

 Stems tall, branched, 50-90 cm. 



high; root not much thickened. L. albicaulis. 

 Stems usually simple, 20 cm. high; 



root much thickened. L. gormani. 



L. 



nootkatensis. 

 suhalpinus. 



lyallii. 

 breweri. 



lepidus. 

 aridus. 



